Squirt cleaning poppet valve and seat

ABSTRACT

A poppet valve and seat, in a particle-entrained fluid flow system, which at closure cause a squirt which, by flushing action, prevents particles from remaining on the sealing interfaces of the poppet valve and of the seat.

United States Patent Tellier NOV. 28, 1972 [52] US. Cl ..137/238,251/333, l37/DIG. 5 [51] Int. Cl ..Fl6k 1/36 [58] Field of Search..251/332, 333; 137/237, 238,

' 137/5 16.25, 516.27, BIG. 5

1,218,030 3/1917 Witmer ..251/333 x 1,962,558 6/1934 Guildford..'.251/333 x 246,132 8/1881 Hastings ..251/333 4 224,133 2/1880 Brazier..251/333 855,517 6/1907 Lippy et al ..251/333 Primary ExaminerAlanCohan Assistant Examiner-Gerald Michelsky Attomeyl-Iarry A. Herbert, Jr.et a1.

[ ABSTRACT A poppet valve and seat, in a particle-entrained fluid flowsystem, which at closure cause a squirt which, by flushing action,prevents particles from remaining on the sealing interfaces of thepoppet valve and of the seat.

lClainylDrawin gligure [56] References Cited UNITED STATES PATENTS1,884,442 10/1932 Wells eta]. ..25l/333 X I I I v PA'TENTEDnuv 28 I972 DN STREAM UP TREHM INVENTOR. Gil-BERT F. TELLIER it?? Z-r NEYS BACKGROUNDOF THE INVENTION This invention relates to a poppet valve and seat in aparticle-entrained fluid flow system.

In such a system, at'closure of the poppet valve and seat, particlesfrom the fluid remain on the sealing interfaces of the poppet valve andseat and, thereby, result in damage to the valve and seat and alsoresult in excessive leakage between valve and seat. Further, inherent insuch a system are large closure impact forces which adversely affect thevalve and seat.

This invention eliminates these problems and disadvantages and,therefore, constitutes a significant advance in the state-of-the-art.

SUMMARY OF THE INVENTION This invention pertains to a novel poppet valveand seat for use in a system where the fluid flowing therein isparticle-entrained.

An object of this invention is to prevent particles in the fluid flowfrom remaining on the sealing interfaces of the valve and seat atclosure and, thereby, to prevent damage to the valve and seat and alsoto prevent excessive leakage between valve and seat.

Another object of this invention is to prevent large impact closureforces when the valve and seat are closmg.

These objects, and other and related ones, of this invention will becomereadily apparent after a consideration of the description of theinvention and reference to the drawing.

DESCRIPTION OF THE DRAWING The drawing is a side elevation view,partially in cross-section and schematic in form, of a preferredembodiment of the invention.

DESCRIPTION OF THE PREFERRED EMBODIMENT With reference to the drawing,therein is shown preferred embodiment of the invention.

Embodiment 10 includes poppet valve 20 and valve seat or closure element30 which mates with valve 20 at annular sealing surfaces or interfaces21, i.e., of the valve, and 31, i.e., ofthe seat.

Valve 20 has, at the geometric center of the valve face, an insert 40with concentric annular shoulders 41 and 42.

Seat 30 has a conduit 60 in its geometric center. Conduit 60 isconnected to a source (not shown) of particle-entrained fluid. The fluidflows in conduit 60. In that regard, the flow of the particle-entrainedfluid in conduit 60 is in the direction shown by the arrows in thedrawing, and the upstream and downstream directions of the fluid floware as indicated in the draw- Seat 30 has, at the exit end of conduit60, a counterbore or recess 32 in which is positioned a ring or annularinsert 50.

MODE OF OPERATION OF THE PREFERRED EMBODIMENT When valve 20 and seat 30close, they mate at sealin interfaces 21 and 31 and anann lar h be foimed by shoulder 41, s oulder 42, ring flf nd ih inside vertical surfaceof recess 32.

During the closing action, a small quantity or volume ofparticle-entrained fluid is trapped within the chamber which is beingformed.

At closure, because of the close fit between the inside vertical surfaceof recess 32 and shoulder 41, and because of the close fit between theinside vertical surface of ring 50 and shoulder 42, particles in thefluid are retained within the chamber, but the fluid therein is forciblyejected, particle-free and in a squirting action which has a flushingeffect, across sealing interfaces 21 and 31, purging out and removingany particles which are entrapped between interfaces 21 and 31.

Additionally, as'a result of the squirting action, closure forces arelimited, i.e., valve 20 and seat 30 do not slam. Also, as a result ofthe squirting action and of the ensuing removal 0 particles betweensealing interfaces 21 and 31, the valve 20 and seat 30 are not damagedat sealing interfaces 21 and 31, as they would be by impact if therewere particles from the fluid on sealing interfaces 21 and 31. Further,there is no excessive leakage between valve 20 and seat 30, as therewould be if particles were on sealing interfaces 21 and 31.

When valve 20 and seat 30 open, the entrapped fluid and the particleswhich were retained within the chamber are flushed downstream.

While there have been shown and described the fundamental features ofthe invention, as applied to a particular embodiment it is to beunderstood that various substitutions and omissions may be made by thoseof ordinary skill in the art without departing from the spirit of theinvention What is claimed is:

1. An apparatus, adapted for use in a fluid flow system wherein thefluid contains particles, comprising:

a.- a poppet valve having, at the valve face, an insert with twoconcentric annular shoulders, with said valve having a sealinginterface; and

. a valve seat having a conduit in which flows the particle-entrainedfluid, and a counterbore surrounding the exit end of the conduit, inwhich counterbore is positioned a ring, with said valve seat having asealing interface which mates with the sealing interface of said valvewhen said valve and said valve seat close;

with said poppet valve and said valve seat so posit'ioned and sodimensioned that, when said valve and said seat are closing and as saidvalve sealing interface is mating with said valve seat sealinginterface, a chamber is formed by said two concentric annular shouldersof said valve, by said ring, and by said counterbore, andparticle-entrained fluid is trapped within said chamber, andparticle-free fluid is squirted out from said chamber by the closingaction, thereby flushing and removing any particles which are betweenthe said sealing interfaces.

1. An apparatus, adapted for use in a fluid flow system wherein thefluid contains particles, comprising: a. a poppet valve having, at thevalve face, an insert with two concentric annular shoulders, with saidvalve having a sealing interface; and b. a valve seat having a conduitin which flows the particleentrained fluid, and a counterboresurrounding the exit end of the conduit, in which counterbore ispositioned a ring, with said valve seat having a sealing interface whichmates with the sealing interface of said valve when said valve and saidvalve seat close; with said poppet valve and said valve seat sopositioned and so dimensioned that, when said valve and said seat areclosing and as said valve sealing interface is mating with said valveseat sealing interface, a chamber is formed by said two concentricannular shoulders of said valve, by said ring, and by said counterbore,and particle-entrained fluid is trapped within said chamber, andparticle-free fluid is squirted out from said chamber by the closingaction, thereby flushing and removing any particles which are betweenthe said sealing interfaces.